A mine roller screen

Abstract

The application discloses a mine roller screen and relates to the technical field of mine equipment. The mine roller screen comprises a chassis, driving rollers, two of which form a group, n groups of which are rotatably arranged on the chassis, a motor, both ends of which are output shafts, universal joints are arranged at the ends of the output shafts, driving shafts are arranged on the universal joints, and the driving shafts are connected with the driving rollers through the universal joints, a cylinder body, which is arranged on the driving rollers in an inclined manner, inner support rings, which are arranged on the circumferential inner wall of the cylinder body, and an equipment shell, which is arranged on the chassis, surrounds the bottom and both ends of the cylinder body, one end of the equipment shell is a feeding port, the feeding port is communicated with the high part of the cylinder body, and the other end and the bottom of the equipment shell are both discharge ports. The application has the effects of improving the rotation stability and service life of the mine roller screen when the length of the mine roller screen exceeds 20 m.

Description

Technical Field

[0001] This application relates to the technical field of mining equipment, and in particular to a mining drum screen. Background Technology

[0002] Mining drum screens are equipment used for screening minerals. They continuously perform the screening process by rotating an inclined drum screen.

[0003] The length of a mining drum screen has a decisive relationship with its screening effect; the longer the screen, the better the screening effect, specifically in terms of screening precision. Furthermore, the drum screen's rotation also grinds the ore. Therefore, the longer the drum screen, the more rounded and higher quality the screened ore and other materials will be.

[0004] Commonly available mining drum screens are typically 3-6 meters long, with some reaching around 10 meters. However, drum screens exceeding 20 meters in length are even rarer. This is because the longer the drum screen, the more difficult it is to achieve the required structural rigidity and deformation control, making it highly susceptible to torsional deformation and sagging in the middle. When a drum screen reaches 20 meters in length, its length-to-diameter ratio reaches approximately 10, while the ratio of a conventional drum screen is around 5-8. Therefore, designing mining drum screens that can maintain structural strength for stable operation and screening even at lengths exceeding 20 meters has become a significant design challenge in the industry. Utility Model Content

[0005] The purpose of this utility model application is to improve the problem that existing drum screen structures are difficult to rotate and screen stably when the design length exceeds 20 meters. This application provides a mining drum screen.

[0006] The technical solution for a mining rotary screen provided in this application is as follows: A mining drum screen, comprising Base frame; Drive rollers, two to a group, are mounted on the base frame in n groups; The motor has output shafts at both ends. A universal joint is installed at one end of the output shaft, and a drive shaft is installed at the universal joint. The other end of the drive shaft is connected to the drive roller through the universal joint. The cylinder is placed at an incline on the drive roller and includes a support ring plate, a connecting beam, and a reinforcing ring. There are n support ring plates, and their circumferential outer walls abut against the drive roller. The connecting beam is fixedly connected to the support ring plates between adjacent support ring plates to form a cylinder cage structure. There are multiple reinforcing rings, which are fixed on the circumferential outer walls of the cylinder cage structure formed by the connecting beam. Multiple inner support rings are fixed to the inner circumferential wall of the cylindrical cage formed by the connecting beams; The equipment casing is mounted on the base frame, surrounding the bottom and both ends of the cylinder. One end is the feed inlet, which is connected to the top of the cylinder, while the other end and the bottom are both discharge outlets.

[0007] Optionally, the spacing between the support ring plates is L, then L≤5m.

[0008] Optionally, two reinforcing ring plates are fixed to the outer circumferential wall of the support ring plate, and the drive roller is located between the two reinforcing ring plates and abuts against the support ring plate.

[0009] Optionally, the area between two reinforcing ring plates on the same support ring plate is the driving area, and multiple stiffeners are fixedly provided on the outer circumferential wall of the support ring plate outside the driving area, and the stiffeners are fixedly connected to the reinforcing ring plates.

[0010] Optionally, a secondary ring plate is fixed on the outer wall of the cylindrical cage structure formed by the connecting beam, and the secondary ring plate is located in the middle of two adjacent support ring plates.

[0011] Optionally, a secondary reinforcing ring is fixed to the circumferential outer wall of the secondary ring plate.

[0012] Optionally, there are two secondary stiffening rings on the secondary ring plate, and a support wheel is mounted on the outer casing of the equipment. The support wheel abuts against the bottom part of the secondary ring plate and is located between the two secondary stiffening rings.

[0013] Optionally, the inner support ring is located in the middle of the sub-ring plate and the support ring plate.

[0014] Optionally, the support ring plate, connecting beam, inner support ring, and reinforcing ring are all made of manganese steel.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. When the design length of the drum screen exceeds 20 meters, the drum body is designed with multiple support ring plates and multiple sets of drive rollers to achieve stable support and drive at various positions of the drum body. The motor is placed in the middle position, which can effectively reduce the torsional force and radial pressure on the drum body. On the other hand, the drum cage structure composed of connecting beams and reinforcing rings can also effectively improve the structural strength of the drum body. The reinforcing rings can improve the structural strength and torsional resistance after the connecting beams are fixed. 2. The secondary ring plate is located in the middle between two adjacent support ring plates of the cylinder. On the one hand, it can improve the structural strength of the connecting beam by connecting with the connecting beam. On the other hand, it can reduce the radial pressure on the cylinder by abutting with the support wheel. The setting of the secondary rib ring can effectively improve the stability of the contact between the support wheel and the secondary ring plate. 3. The inner support ring not only reinforces the connecting beam inside the cylinder, but also, together with the reinforcing ring, further improves the structural strength of the cylinder. In addition, the inner support ring is located between the secondary ring plate and the support ring plate, which can more effectively strengthen the connection beam at the location where it is under greater pressure. 4. The material design of the cylinder structure and the distance design between the supporting ring plates can ensure the structural strength for stable rotation of the drum screen after the length of the drum screen exceeds 20 meters, especially after the shaft diameter ratio changes from that of the traditional drum screen, thereby improving the service life of mining drum screens exceeding 20 meters. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a partial schematic diagram of the display cylinder; Figure 3 This is a partial sectional view of the cylinder; Figure 4 This is a partial schematic diagram showing the support wheel; In the diagram, 1. Base frame; 11. Drive roller; 12. Motor; 121. Drive shaft; 122. Universal joint; 2. Equipment casing; 21. Feed inlet; 22. Discharge outlet; 23. Support wheel; 3. Cylinder; 31. Support ring plate; 311. Reinforcing ring plate; 312. Drive zone; 313. Rib plate; 32. Connecting beam; 321. Inner support ring; 322. Secondary ring plate; 323. Secondary rib ring; 33. Reinforcing ring. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0018] This application discloses a mining drum screen.

[0019] refer to Figure 1 The mining drum screen includes a base frame 1, an outer casing 2, and a drum body 3. Multiple drive rollers 11 are rotatably mounted on the base frame 1 via bearing seats. Two drive rollers 11 are grouped together, and n groups are equidistantly arranged on the base frame 1. Two motors 12 are mounted on the base frame 1, located in the middle of the base frame 1. Each motor 12 has two output shafts located at both ends. Universal joints 122 are mounted on the output shafts of each motor 12. Drive shafts 121 are mounted on the universal joints 122, and the other end of the drive shaft 121 is connected to the drive rollers 11 via the universal joints 122. That is, adjacent drive rollers 11 are also connected via one drive shaft 121 and two universal joints 122, with the two universal joints 122 located at both ends of the drive shaft 121 and fixedly connected to the drive rollers 11.

[0020] The cylinder 3 is placed at an angle on the drive roller 11, with the angle ranging from 6 to 10°, and 6° in this embodiment. The outer casing 2 is mounted on the base frame 1, surrounding the bottom and both ends of the cylinder 3. One end of the outer casing 2 is a feed inlet 21, which connects to the top of the cylinder 3. The other end and bottom of the outer casing 2 are both discharge outlets 22.

[0021] Minerals and other materials enter the cylinder 3 through the feed inlet 21 of the outer casing 2. The motor 12 drives the drive shafts 121 at both ends to rotate, which in turn drives the drive rollers 11 to rotate. The drive rollers 11 drive the cylinder 3 to rotate, thereby realizing the screening and grinding of minerals inside the cylinder 3. The motor 12 is located in the middle position, which can effectively reduce the resistance of the motor 12, especially when the cylinder 3 exceeds 20m, which can effectively improve the service life of the motor 12.

[0022] refer to Figure 2 and Figure 3 The cylindrical body 3 includes support ring plates 31, connecting beams 32, and reinforcing rings 33. There are n support ring plates 31, where n ≥ 3. The circumferential outer wall of the support ring plate 31 abuts against the drive roller 11. Two reinforcing ring plates 311 are fixedly provided on the circumferential outer wall of the support ring plate 31, and the drive roller 11 is located between the two reinforcing ring plates 311 and abuts against the support ring plate 31. The area between the two reinforcing ring plates 311 of the same support ring plate 31 is the driving area 312. Multiple stiffening plates 313 are fixedly provided on the circumferential outer wall of the support ring plate 31 outside the driving area 312, and the stiffening plates 313 are fixedly connected to the reinforcing ring plates 311. Multiple connecting beams 32 are fixedly connected to the circumferential inner wall of adjacent support ring plates 31 to form a cylindrical cage structure. The connecting beams 32 are arranged parallel to each other. Multiple reinforcing rings 33 are fixed to the circumferential outer wall of the cage structure formed by the connecting beams 32. The central axis of the reinforcing rings 33 is collinear with the central axis of the cage structure formed by the connecting beams 32. The spacing between the connecting beams 32 and the reinforcing rings 33 is the same between adjacent support ring plates 31. The spacing between the connecting beams 32 and the reinforcing rings 33 gradually increases towards the bottom of the cylinder 3. The spacing of the support ring plates 31 is L, where L ≤ 5m, thus ensuring that the connecting beams 32 do not deform due to torque during the rotation of the cylinder 3.

[0023] refer to Figure 3 and Figure 4A secondary ring plate 322 is fixed at the middle position of the outer wall of the cylindrical structure 3 formed by the connecting beam 32. The thickness of the secondary ring plate 322 is less than the thickness of the support ring plate 31. Two secondary reinforcing rings 323 are fixed on the circumferential outer wall of the secondary ring plate 322. A support wheel 23 is rotatably mounted on the outer shell 2 directly opposite the secondary reinforcing rings 323. The support wheel 23 abuts against the bottom part of the secondary ring plate 322 and is located between the two secondary reinforcing rings 323. Multiple inner support rings 321 are also fixed on the circumferential inner wall of the cylindrical structure formed by the connecting beam 32. The inner support rings are located at the middle position between the secondary ring plate 322 and the support ring plate 31. The cross-sectional diameter of the inner support ring 321 is smaller than the cross-sectional diameter of the reinforcing ring 33.

[0024] Among them, the support ring plate 31, connecting beam 32, reinforcing ring 33 and inner support ring 321 are all made of manganese steel. All structural connections inside the cylinder 3 are fixed by welding.

[0025] The metal cage structure formed by the connecting beam 32, the supporting ring plate 31, and the reinforcing ring 33 effectively improves the structural strength and torsional resistance of the cylinder 3 itself. The reinforcing ring plate 311 on the supporting ring plate 31 not only improves the structural strength of the supporting ring plate 31 but also effectively enhances the stability of the contact position between the drive roller 11 and the supporting ring plate 31. The connecting beam 32 is welded to the circumferential inner wall of the supporting ring plate 31, and reinforced on the outside of the cage structure formed by the connecting beam 32 by the reinforcing ring 33, effectively improving the structural strength of the cylinder 3. Furthermore, the secondary ring plate 322 not only reinforces the middle of the cage structure formed by the connecting beam 32 but also provides support through the contact between the supporting wheel 23 and the secondary ring plate 322, improving the rotational stability of the cylinder 3 and reducing the probability of deformation in the middle of the cylinder 3. The inner supporting ring 321 reinforces the connecting beam 32 inside the cylinder 3, acting as an internal support and improving the torsional resistance of the cylinder 3. Furthermore, by combining the material selection of the cylinder 3 and the spacing setting of the support ring plates 31, when the length of the cylinder 3 is greater than 20m, the cylinder 3 can achieve more stable rotation, thereby improving the service life of the mining drum screen.

[0026] The design features disclosed above are more effective on mining drum screens with a length greater than 20m.

[0027] The implementation principle of a mining drum screen according to an embodiment of this application is as follows: After the mineral is fed into the drum 3 through the feed inlet 21, the rotating drum 3 screens and grinds the mineral. During the rotation of the drum 3, the contact between the support wheel 23 and the auxiliary ring plate 322 can further improve the stability of the drum 3's rotation and also support the middle part of the connecting beam 32, reducing the pressure on the middle part of the connecting beam 32. This design, together with the inner support ring 321, can effectively improve the uniformity of stress on the cage structure formed by the connecting beam 32. By designing the composition and material spacing of the connecting structure of the drum 3 of the mining drum screen, the drum 3 can have better torsional resistance when its length is greater than 20m, resulting in a better service life and a better rotational screening effect.

[0028] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mining drum screen, characterized in that: include Base frame (1); Drive rollers (11) are arranged in groups of two, and n groups are mounted on the base frame (1) for rotation. The motor (12) has output shafts at both ends. A universal joint (122) is installed at the end of the output shaft. A drive shaft (121) is installed on the universal joint (122). The other end of the drive shaft is connected to the drive roller (11) through the universal joint (122). The cylindrical body (3) is placed at an incline on the drive roller (11) and includes a support ring plate (31), a connecting beam (32) and a reinforcing ring (33). There are n support ring plates (31), and their circumferential outer walls abut against the drive roller (11). The connecting beam (32) is fixedly connected to the support ring plates (31) between adjacent support ring plates (31) to form a cylindrical cage structure. There are multiple reinforcing rings (33), which are fixed on the circumferential outer walls of the cylindrical cage structure formed by the connecting beam (32). Multiple inner support rings (321) are fixed on the inner circumferential wall of the cylindrical cage formed by the connecting beam (32); The equipment casing (2) is installed on the base frame (1) and surrounds the bottom and both ends of the cylinder (3). One end is the feed inlet (21), which is connected to the top of the cylinder (3). The other end and the bottom are both discharge outlets (22).

2. A mining drum screen according to claim 1, characterized in that: If the spacing between the support ring plates (31) is L, then L≤5m.

3. A mining drum screen according to claim 1, characterized in that: Two reinforcing ring plates (311) are fixed on the outer circumferential wall of the support ring plate (31), and the drive roller (11) is located between the two reinforcing ring plates (311) and abuts against the support ring plate (31).

4. A mining drum screen according to claim 3, characterized in that: The area between two reinforcing ring plates (311) on the same support ring plate (31) is the driving area (312). Multiple stiffeners (313) are fixedly provided on the outer circumferential wall of the support ring plate (31) outside the driving area (312). The stiffeners (313) are fixedly connected to the reinforcing ring plate (311).

5. A mining drum screen according to any one of claims 1-4, characterized in that: The outer wall of the cylindrical cage structure formed by the connecting beam (32) is fixed with a secondary ring plate (322), which is located in the middle of two adjacent supporting ring plates (31).

6. A mining drum screen according to claim 5, characterized in that: A secondary reinforcing ring (323) is fixedly provided on the circumferential outer wall of the secondary ring plate (322).

7. A mining drum screen according to claim 6, characterized in that: There are two secondary reinforcing rings (323) on the secondary ring plate (322). A support wheel (23) is mounted on the outer shell (2) of the equipment. The support wheel (23) abuts against the bottom part of the secondary ring plate (322) and is located between the two secondary reinforcing rings (323).

8. A mining drum screen according to claim 5, characterized in that: The inner support ring (321) is located in the middle of the sub-ring plate (322) and the support ring plate (31).

9. A mining drum screen according to claim 1, characterized in that: The support ring plate (31), connecting beam (32), inner support ring (321) and reinforcing ring (33) are all made of manganese steel.

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